Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/html

Source/core/html/canvas/WebGLContextEvent.h

Index: Source/core/html/canvas/WebGLContextEvent.h
diff --git a/Source/core/html/canvas/WebGLContextEvent.h b/Source/core/html/canvas/WebGLContextEvent.h
index c4e088d3a51e7ce2a90e0157f7480c81a9b97a17..e8028a2a6c1c0a0c08406bc413f414ed59a69bb2 100644
--- a/Source/core/html/canvas/WebGLContextEvent.h
+++ b/Source/core/html/canvas/WebGLContextEvent.h
@@ -36,7 +36,7 @@ struct WebGLContextEventInit : public EventInit {
     String statusMessage;
 };
 
-class WebGLContextEvent FINAL : public Event {
+class WebGLContextEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 
 public:
@@ -56,9 +56,9 @@ public:
 
     const String& statusMessage() const { return m_statusMessage; }
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     WebGLContextEvent();